Through an exchange , like binance , coinbase ,kraken , bitpanda or blockchain.
A lil complicated with settings and layouts but best of managing the wallet/portofolio .
Create account, verify all info or doc required.
Choose payment method : wire-bank or credit card.
Turn on 2FA / SMS security in case.
Pretty easy tho .
We dont actually teach the first level here but ATN Family welcomes every new member or any ask of help.
For further information ,find a tutorial in youtube.
Good luck in your journey bro.